John deere 4020 problems

Aug 17, 2014 · Posted 8/17/2014 15:15 (#4023086 - in reply to #4023062) Subject: RE: John Deere 4020 Powershift. Southeastern, IL. Very tough transmission. We have a 67 model with 9300 hours. It has M & W turbo that is running around 120 hp. It use to pull a 12 row planter with 400 gallon of fluid for 15 years and then just bare planter for 5 years.

Re: 1967 4020 generator problems in reply to GLEN J, 12-04-2006 06:56:42. See if you have 12 - 14.5 or 24 - 28 volts if a 24V system on battery terminals with a voltmeter indicating enough charging. If not check wiring, regulator, grounds, terminals, cables or pull generator and have it bench tested.1964 JD 4020. S/N 111000 range. Don't have that number with me. Answered in 16 hours by: Mechanic: Dan. Dan. Category: Agriculture and Farm Equipment. Satisfied Customers: 17,110. Experience: 17+ yrs. shop and field experience with all major brands of heavy equipment, trucks and farm equipment - 1995 WyoTech graduate.Jul 6, 2020. #1. Don't be real quick to assume the trans pump is bad. The Deere service manual tells how to check for flow and Cliff Nelson had me make a gauge setup to check trans pump pressure. It is just a gauge put in the banjo fitting on top the hyd. pump. I thought I had a bad trans pump but I just needed to set the front pump pressure up ...We have 9 3020-4020 tractors and they all act as you describe.We just live with it because after 1 minute all the hyd. work fine,part of farming with 40-50 year old tractors.I don't start in the mornings like I did 25 years ago either.LOL. OP.John Deere tractors are made in America at a number of plants throughout the country, primarily in Illinois and Iowa. Many of these factories offer guided tours that provide an ins...The John Deere 4020 uses a cartridge-style oil filter that is 6-7/16 inches tall and 3-1/8 inches wide. This oil filter is commonly identified by the part number AR26350. Several reputable online retailers sell replacement oil filters for the 4020, including: Steiner Tractor Parts. Nick Young Tractor Parts.

6 posts · Joined 2020. #1 · Aug 13, 2020. I have a John Deere 4020 and the power steering has stopped working in one direction. When this tractor was evening used daily we never had any trouble with the steering. Now that it only gets used very little we have steering trouble. Is this problem in the steering column or would it be in the pump?4020 injector pump issue. Jump to Latest Follow. 10K views 13 replies 3 participants last post by thepumpguysc May 16, 2022. mastrkee Discussion starter. 27 …The super 4020 title was a very accurate on for them. 18.4x38 tires are probably the most common size for them. The power difference between them and a 4020 is very noticeable. Without a turbo a 4020 will usually smoke very heavy once you push it to around 110 hp. With the turbo the 4320 can push up near 150 with very little difficulty.Diesel won't start or hard to start. Fuel filter is dirty - Change the filter element. The fuel shut-off valve is closed - Open fuel shut-off valve. Air trapped in fuel system - Bleed air. …Posted 4/28/2023 11:47 (#10207028 - in reply to #10205538) Subject: RE: 4320 John Deere loose hydraulic when clutch is depressed. ecmn. Key take away is "long time" you have some reserve between oil returning from something, cooler and reservoir. The time is the big difference between a problem or not.I have a '67 4020. It has the two metal fuel filters. loosen the bleed screw on the bottom one, pump the lever on the back side of the fuel pump until fuel starts to run out, close it and open the one on the top filter.Re: 4020 powershift problem in reply to Wayne, 03-06-2004 22:56:18. Our 4020 had the same problem yours has with the park. I was able to fix it by shortening the park cable. You can do this behind the dash by taking off the hood cowl (I think that's what it's called). It has a threaded end so it can be shortened.John Deere 4020 12-Volt Wiring Common Issues and Troubleshooting Tips. The John Deere 4020 is a popular tractor model among farmers and enthusiasts. However, like any other machinery, it may encounter wiring issues from time to time. Here are some common problems and troubleshooting tips related to the 12-volt wiring on the John …

Many of the low-effort hacks don't actually work. Here's what does. Of all the garden pests, deer can be some of the most frustrating. They don’t care if you’re sprinkling coffee g...15 Jan 2021 ... how to operate john deere 8 speed synchro transmission.Welcome to my TF. JD 4020 utilizes front hyd pump which should have stand-by pressure of 2250 psi. Frt wheels turning right on engine startup sounds as if piston seals in frt steering motor have failed. These piston seals can be replaced by removing frt axle, one side frame, remove plug (item 4)& lowering steering spindle (item 15) & pulling ...JD 4020 Diesel Charging Problem. Jump to Latest Follow 21 - 33 of 33 Posts. 1 2. R. RLstangs · Registered. Joined ... A forum community dedicated to John Deere tractor owners and enthusiasts. Come join the discussion about towing, PTO’s, reviews, attachments, modifications, troubleshooting, maintenance, and more! ...Look at the ends of the rocker shaft, are the rubber plugs right against the cotter pins? Had a 4020 that the rubber plugs got hard and moved into the shaft tube and cut off the oil to the shaft. But it does sound like the problem is deeper. The brazing rod trick that Janicholson mentioned won't work unless the head is off.#1. My new 4020 has some hydraulic issues. The steering and brakes work good, but the remotes are very slow and will barely lift anything. First I checked the priority valve to see if it was stuck, but it was moving fine. Then we pulled the stroke control valve, which was stuck. We freed it up and thought that we had found the problem.

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John Deere: diesel: 6-cylinder 12-valve: liquid-cooled inline: Oil capacity on most 4020 diesels increased from 8 to 12 quarts starting with the 1969 model year, tractor serial number 201,000. High-crop diesel tractors retained the 8-quart capacity throughout the production run.Technician: Curtis B. This is the piece in the front end of tractor that hooks to the steering linkage. It acts as the power steering cylinder and rotates the steering shaft that goes to the front wheels. With a john deere it can be either the steering valve on the end of the steering hand wheel shaft or this.May 22, 2009 · I have a '67 4020. It has the two metal fuel filters. loosen the bleed screw on the bottom one, pump the lever on the back side of the fuel pump until fuel starts to run out, close it and open the one on the top filter. Then slide the outer quadrant back in and if possible, add an extra washer behind the snap ring to remove excess slop in quadrants. Rod #24 should not need adjustment if shifting was ok before the other rod broke. If all the shifting mecanism has not ever been rebuilt you probably need to replace all worn parts to get everything back in …Aug 29, 2020 · Owner replaced generator with alternator because the 4020 is indeed a hoss. Designed to run on row crops all day at full speed. Off and on hay use would not keep the batteries charged. Alternator supposed to charge better at slower speeds and shorter run times. At least that is why the owner said he swapped it out. Report to Moderator. Re: 4020 gas distributor in reply to Ryan, 10-19-2004 08:28:20. I would suggest doing a compression test on it warm up the engine first then make sure the choke is not shut and the throttle is full open to allow air to enter freely. Won't hurt to check the adjustment on the rocker arms for proper clearance.

The John Deere 4020 may experience problems regarding the hydraulic, clutch, steering, powershift, and PTO mechanisms. Worn-out, damaged, and loose components and linkages are the majority of reasons for the problems.May 8, 2014 · The original 24 volt 4020 can be hard on batteries if its not run several hours per start. Its sure to take at least 300 amps for ten seconds starting but the generator only puts out 10 amps, so it take a long time the recharge. Posted 3/26/2011 07:09 (#1690797) Subject: 4020 generator light issue solved. West Central Iowa. Following up on the dim generator light issue on my 1964 4020 diesel, open station tractor from last night. After doing some more checking, it became obvious that there still had to be a resistor in the circuit of the generator light.Hantavirus is a life-threatening viral infection spread to humans by rodents. Hantavirus is a life-threatening viral infection spread to humans by rodents. Hantavirus is carried by...disconnect all the lines & linkages.. remove the side cover on the pump, 2 flat head screws, drain.. 2 lines under the side cover, 1 is stationary & 1 rotates.. rotate engine until BOTH lines line-up & stop.. Now remove the 2 or 3 nuts holding the pump down & pull up.. DONE.Right when our spring cultivation season was finished the clutch went out on our Tractor. We were able to ship down a new clutch, bearings, gauge tool, and ...The John Deere 4020 uses a cartridge-style oil filter that is 6-7/16 inches tall and 3-1/8 inches wide. This oil filter is commonly identified by the part number AR26350. Several reputable online retailers sell replacement oil filters for the 4020, including: Steiner Tractor Parts. Nick Young Tractor Parts.May 30, 2009 · May 30, 2009. #1. I have a 4020 that is not getting any fuel to the injectors. I have bled the system and transfer pump is pumping good up to the injector pump. But when I crack the injectors nothing. There is a 5/16 bolt on the outward side of the injector pump. If I loosen this bolt, it will run normally but shoots fuel out the hole.

Technician: Curtis B. This is the piece in the front end of tractor that hooks to the steering linkage. It acts as the power steering cylinder and rotates the steering shaft that goes to the front wheels. With a john deere it can be either the steering valve on the end of the steering hand wheel shaft or this.

A pressure mark is a sign of physical damage to the inside of an LCD screen. It is related to, but not always synonymous with, the problem of dead or stuck pixels. Usually it is no... Re: 1967 4020 generator problems in reply to GLEN J, 12-04-2006 06:56:42. See if you have 12 - 14.5 or 24 - 28 volts if a 24V system on battery terminals with a voltmeter indicating enough charging. If not check wiring, regulator, grounds, terminals, cables or pull generator and have it bench tested. Super busy on the farm preparing for fall harvest. #farming #farm #georgiasouthern #johnDeere #tractorJul 26, 2016 · 1) The 4020 in question is a front console, manual PTO. 2) It had been making a whining noise with the PTO running for a while, apparently coming from the stack of gears between the bell housing and the transmission. 3) My brother in law was round baling, heard a loud bang and the tractor stalled out. He disengaged the PTO and the tractor drove ... Well-known Member. Nov 3, 2009. #1. I have an early 4020 and I just put an overhaul kit in the brake valve. I put everything back together following my JD service manual. Then I bleed the brakes. Now the brakes are totally locked up. The tractor won't move. But if I open the bleed screws, it will move.The John Deere 4020 is a reliable tractor, but it does have its fair share of problems. From transmission issues to hydraulic leaks, the 4020 can require regular maintenance and repairs. However, with proper care and attention, these problems can be minimized, allowing farmers to continue utilizing this iconic piece of machinery for years to come.Apr 20, 2009. #1. If it is a non side console chances are it is a bad thermal relief valve located in the end plate of the rockshaft control valve housing. I just replaced mine ($15 from Deere) on my 2510 and it made a huge difference. It still floats down over night but before it would beat me in a race to see who could contact the ground first.Subject: Re: 4020 powershift problems. ecmn. the reverse issue is just the lever under the dash. a little weld build up and grind to new shape makes it right. the park you can look down on the right side and see if the linkage moves the little lever down there. some times the roll pin breaks so the paw doesn't lock.We have 9 3020-4020 tractors and they all act as you describe.We just live with it because after 1 minute all the hyd. work fine,part of farming with 40-50 year old tractors.I don't start in the mornings like I did 25 years ago either.LOL. OP.The 4010 and VERY early (IIRC, pre-'65) 4020 tractors DO have a 3rd reverse. The later early models and on only have 2 reverse gears that are sped up. The the early ones, 1st reverse is the same speed as 3rd forward, 2nd reverse is like 5th and 3rd reverse is like 7th. So, 3rd reverse is 12mph. Great for plowing snow. :rock.

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4020 Powershift - Shifting Issue. I have a 1966 4020 Powershift, lot of hours but fairly well taken care of. Shifts into reverse fine ---- when switching to forward it wants to miss. I have to shift back to reverse and then back to forward to get it to hit. Sometimes it will miss again, other times it picks right up like it should.26 posts · Joined 2016. #1 · Jun 12, 2016 (Edited) My older 4020 with hydraulic levers on the dash is having starter problems. It's still a 24 volt system. I push the starter button and I hear the starter motor turning but the bendix does not engage the flywheel... or it is every so slightly engaging that it doesn't even sound like it's grinding.Re: 4020 draft sensitivity problems in reply to Dave Walsh, 12-17-2006 18:57:57. I checked my shop manual for pre side console 4020. The only adjustment is the speed of drop, that lock nut and screw on the back cover of the rock shaft cylinder, just above the anchor of the upper three point link. Turning the screw in slows the oil leaving …Oil pumps have pickup screens that will stop a large part like a screw from being picked up, however, small bits of a broken shaft may pass through the openings and lodge in the rotors of the pump. If you did spin a bearing, plan a full lower end rebuild. 2010 3320 Cab. Loaded R3's, 300CX w/3rd SCV. 61" HD-Tooth Bar, 72" HD-bolt-on edge ...6 posts · Joined 2020. #1 · Aug 13, 2020. I have a John Deere 4020 and the power steering has stopped working in one direction. When this tractor was evening used daily we never had any trouble with the steering. Now that it only gets used very little we have steering trouble. Is this problem in the steering column or would it be in the pump?Weird shifting problem - JD 4020. We have a 1969 John Deere 4020. A while back I began having shifting problems: If I put it in 5R, I need to fully let out the clutch for at least a 2 full seconds, or I will only be able to shift it into 5, 4, and 7. If I don't fully let it out, I'll have to turn the tractor off, turn it back on, place it in ...Member. Oct 12, 2023. #4. I had a couple broke off of my 4020 and I used JB weld on them. Make sure the surfaces are clean and I roughed them up with some really coarse sandpaper so that the JB weld had something to bite. I have had them on for 6 months and so far so good. C.Troubleshoot a John Deere lawn mower by checking for common problems like clogged fuel filters, defective spark plugs and clogged carburettors. While examining these problems, look...A pressure mark is a sign of physical damage to the inside of an LCD screen. It is related to, but not always synonymous with, the problem of dead or stuck pixels. Usually it is no...It's also why Deere special ordered those pumps with an easily adjustable advance screw. 4020 is supposed to get a timing advance up around 16 engines degrees. That is a lot, and if it's not happening it can make a big difference in performance. 4020 is supposed to advance 2 engine degrees by 1000 engine RPM. Advance 10 degrees by …0:00 Intro0:48 DBGVC633-5AJ2:30 OutroWelcome back to THE PARTS COUNTER at Area Diesel Service! In this series, our Parts and Sales Manager Curtis Owens will ... ….

Jan 28, 2017 · Posted 1/28/2017 23:15 (#5801298 - in reply to #5801223) Subject: RE: conclusion to 4020 camshaft / injection timing problem. Eastern Iowa. The cam gear would not clear the cast hydraulic pump support and if that was removed it would have hit the steering box. Cam barely cleared the steering box with gear removed. This was the direction that Deere headed in, and the John Deere model 4000 was born. The one thing that Deere did not want to change when they created the 4000 from the 4020 was the engine. The six cylinder, 404 cubic inch engine produced over 91 horsepower at the PTO, and was quite efficient, as well, as its economy rating put it very near the ...John Deere 4020 12-Volt Wiring Common Issues and Troubleshooting Tips. The John Deere 4020 is a popular tractor model among farmers and enthusiasts. However, like any other machinery, it may encounter wiring issues from time to time. Here are some common problems and troubleshooting tips related to the 12-volt wiring on the John …4020 steering problem. Jump to Latest Follow ... Former JDs: John Deere 318, 50in deck, 54in blade w/ power angle. Save Share. Like. flyweight. 24157 posts ...The hydraulic system of your John Deere 4020 is essential for operating various attachments and implements. If your tractor’s hydraulic system is not working properly, it can affect the tractor’s performance and make it difficult to operate. Most problems on machines like the John Deere 4020 arise from … See more19644020 Discussion starter. 18 posts · Joined 2013. #3 · May 9, 2014. all of the other hydraulics function with out any problems. the tractor has one set of remotes that go to a tee that supplies the FEL and the implements. the only thing i've noticed about the FEL is when it is going up it kinda shakes like the pressure is pulsing rapidly ...4020 History. 4020 Fans; Models 4020, 3020, 4000 - Fan Letter; 4020 Photos; 4020 Serial Numbers; 4320 (Super 4020) "'The Long Green Line (tm)' of John Deere Tractors has included several that were classic - the models 'D', 'A' and 'G', among others. But none wears that designation more deservedly than the 4020. It was the most popular tractor ...Oil pumps have pickup screens that will stop a large part like a screw from being picked up, however, small bits of a broken shaft may pass through the openings and lodge in the rotors of the pump. If you did spin a bearing, plan a full lower end rebuild. 2010 3320 Cab. Loaded R3's, 300CX w/3rd SCV. 61" HD-Tooth Bar, 72" HD-bolt-on edge ... John deere 4020 problems, 6 posts · Joined 2020. #1 · Aug 13, 2020. I have a John Deere 4020 and the power steering has stopped working in one direction. When this tractor was evening used daily we never had any trouble with the steering. Now that it only gets used very little we have steering trouble. Is this problem in the steering column or would it be in the pump?, If you’re in the market for a new John Deere tractor or are looking to sell one that you have on your farm, you’ll want the most relevant pricing information that you can find. Rea..., President Joe Biden just signed a sweeping executive order that will create right-to-repair rules for cellphone companies, as well as big ag companies like John Deere. Who would be..., John Deere 4020 Problems, Specs, Attachments, Weight, Price, Engine and More. December 15, 2022 by Frank A. Richardson. John Deere 4020 is one of the most popular tractor models ever made. It was first introduced in 1963 and was in production for 19 years. It was a versatile machine that could be used for a variety of …, New User. Jul 10, 2009. #1. Looking for advice on a older model (1966)John Deere 4020 with the dash-mounted shifter controls. Syncro-Range Transmission. Last year I started having problems getting into third and low reverse gears (these two gears works out of the same slot). This year it gotten worse to the point I can’t get into these at all., Re: 4020 powershift problem in reply to Wayne, 03-06-2004 22:56:18. Our 4020 had the same problem yours has with the park. I was able to fix it by shortening the park cable. You can do this behind the dash by taking off the hood cowl (I think that's what it's called). It has a threaded end so it can be shortened., Sep 7, 2015 · JD 4020 Diesel Charging Problem. Jump to Latest Follow ... John Deere 4066R Deluxe Cab, 440R MSL Loader, AY11E72 4-in-1 Bucket, 485A Backhoe , Feb 14, 2021. #1. Directly behind the oil pressure gauge is a small hole in the governor housing. Oil will go through that hole and run down a trough to the oil tube. Remove the oil pressure gauge and take a small stiff piece of wire and you can unclog the hole. I had the same issue with a 37 A. It takes some. patience but it can be done. OP., Aug 1, 2012 · Total for the rebuild was $700 but was still cheaper than buying a reman brake valve, at least according to the local JD dealer anyway. Good News....the original brake valve was rebuildable. It solved the entire problem and it stops great. No more wheel lock up. The JD 4020 is now ready to go back to work. , The John Deere 5.9 L, 5,930 cm 2, (362 cu·in) six-cylinder LPG / gasoline engine with 108.0 mm (4.25 in) of cylinder bore and 108.0 mm (4.25 in) of piston stroke. The compression ratio rating is 7.5:1 for gasolibe version and 9.0:1 for LPG-version. Following attachments are available for John Deere 4020 farm tractor: John Deere 148 front ..., Jul 29, 2016 · Both transmissions were pretty darned tough, but today the newest are 44 years old. I have 2 syncros and 1 power shift (4020s), plus a 2510, 3020, 4320. As far as sales data goes, it is sort of a guess. It would be a fair guess to say in the earlier years, (64-68) the 4020 sales were probably 35-40% power shift. , 4020 Starting Problems. Hello! I am trying to get my Dad's 1969 4020 started this winter so I can move some snow. I have tested both batteries (two 6 volt connected in series) and they are good. I have replaced the starter relay (please correct the terminology if it's wrong - I'm referring to the canister that sits at about knee level when ..., 28 Apr 2022 ... Our old 4020 need a new motor. Today I will go over some of the challenges that I had making a decision on what to use, and talk about some ..., Re: 4020 draft sensitivity problems in reply to Dave Walsh, 12-17-2006 18:57:57. I checked my shop manual for pre side console 4020. The only adjustment is the speed of drop, that lock nut and screw on the back cover of the rock shaft cylinder, just above the anchor of the upper three point link. Turning the screw in slows the oil leaving …, Re: 4020 NOISY hydraulics in reply to buckeye al, 05-24-2002 14:33:20. SOUNDS LIKE YOU HAVE SURGEING OIL MAKING THE PRESSURE CONTROL VALVE MOVE BACK AND FORTH. YOU PROBABLY HAVE A PISTON HANGING UP OR A LEAKING INTAKE OR EX-VALVE IN THE PUMP. A PRESSURE GAUGE WILL SHOW THIS SURGE., The John Deere 4020 may experience problems regarding the hydraulic, clutch, steering, powershift, and PTO mechanisms. Worn-out, damaged, and loose …, Re: 4020 NOISY hydraulics in reply to buckeye al, 05-24-2002 14:33:20. SOUNDS LIKE YOU HAVE SURGEING OIL MAKING THE PRESSURE CONTROL VALVE MOVE BACK AND FORTH. YOU PROBABLY HAVE A PISTON HANGING UP OR A LEAKING INTAKE OR EX-VALVE IN THE PUMP. A PRESSURE GAUGE WILL SHOW THIS SURGE., New User. Jul 10, 2009. #1. Looking for advice on a older model (1966)John Deere 4020 with the dash-mounted shifter controls. Syncro-Range Transmission. Last year I started having problems getting into third and low reverse gears (these two gears works out of the same slot). This year it gotten worse to the point I can’t get into these at all., '68 4020 powershift hydraulic problems. ... Hello all, Needing help. My 4020 external hydraulics up and stopped working today. Steering and brakes work well but no remotes or rockshaft. Transmission temp guage showed warmer than normal. ... A forum community dedicated to John Deere tractor owners and enthusiasts. Come join the …, Re: 1967 4020 generator problems in reply to GLEN J, 12-04-2006 06:56:42. See if you have 12 - 14.5 or 24 - 28 volts if a 24V system on battery terminals with a voltmeter indicating enough charging. If not check wiring, regulator, grounds, terminals, cables or pull generator and have it bench tested. , John Deere 4020 Problems, Specs, Attachments, Weight, Price, Engine and More. December 15, 2022 by Frank A. Richardson. John Deere 4020 is one of the most popular tractor models ever made. It was first introduced in 1963 and was in production for 19 years. It was a versatile machine that could be used for a variety of tasks on the farm ..., John Deere is one of the most popular tractor and equipment manufacturers, and if you own one you know why. Owners love to bond and share knowledge with each other. The customer se..., Sep 25, 2021 · Howdy, I’m new to the forum and so far y’all have helped me get my 4020 going. But I have a weird electrical issue that’s driving me nuts. The problem is that after I converted to the 12V system, I’ve had hell getting this thing to start. I have a single key ignition system and no safety switches but for some reason, my relay/non ... , Coyote Flats, Texas. Nov 15, 2009. #1. allenhughey [/quote] have a 1972 4020 with syncro transmission. The tractor looses power when climbing any kind of small hill. I have gotton the tractor stuck a few times and the rear tires can not even get moving at high rpm in lowest gears. Traction/drive clutch is slipping which in turn causes trans ..., Take disc, and slip it on the front of the small shaft and see if the PTO shaft moves in the rear when disc is turned. Ask Your Own Agriculture and Farm Equipment Question. Ok. Mechanic: Curtis B. Might all be good. Ask Your Own Agriculture and Farm Equipment Question. when spinning it the the pto still isn’t spinning. Mechanic: Curtis B., Subject: Re: John Deere 4020 3 point. Ayr Queensland Australia 4807. On a 4020 when the hitch lever is fully back the raise valve is held open so unless they have an inlet check like later models the hydraulic discharge valves could be the issue. Put the hitch in min or position control and raise it half way to test. Shippy., Aug 17, 2014 · Posted 8/17/2014 15:15 (#4023086 - in reply to #4023062) Subject: RE: John Deere 4020 Powershift. Southeastern, IL. Very tough transmission. We have a 67 model with 9300 hours. It has M & W turbo that is running around 120 hp. It use to pull a 12 row planter with 400 gallon of fluid for 15 years and then just bare planter for 5 years. , #1 · Nov 4, 2015. Gents, I have a 1964 4020 with the original 24 volt starter. Recently, after trying to start the tractor I noted the starter ran on after I released the key from the start …, John Deere 4020 12-Volt Wiring Common Issues and Troubleshooting Tips. The John Deere 4020 is a popular tractor model among farmers and enthusiasts. However, like any other machinery, it may encounter wiring issues from time to time. Here are some common problems and troubleshooting tips related to the 12-volt wiring on the John …, John Deere Wiring Harness - Steiner Tractor Parts I guess you plan on staying with the 12v. Just make sure the folks you buy from know you have upgraded. Ebay has them also. Here is a JD parts John Deere Parts Catalog showing a diagram, make sure that's you're serial number, or look for yours on the 4020 JD parts using your serial number., As of October 2014, John Deere manuals are found online at the John Deere website by clicking on the “Services & Support” tab. Manuals are offered for online viewing for model year..., Jun 21, 2009. #1. Hello, I have a 1967 John Deere 4020. About a month ago, I decided that I would fix the fuel gauge on it. I bought a new sensor from AI Products and I bought a new gauge from them also. When I installed them, the gauge would show about 3/4 full whether it was empty or full., May 22, 2009 · I have a '67 4020. It has the two metal fuel filters. loosen the bleed screw on the bottom one, pump the lever on the back side of the fuel pump until fuel starts to run out, close it and open the one on the top filter.